Spin change of a proto-neutron star by the emission of neutrinos
- Authors
- Ryu, Chung-Yeol; Maruyama, Tomoyuki; Kajino, Toshitaka; Mathews, Grant J.; Cheoun, Myung-Ki
- Issue Date
- 6-Apr-2012
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v.85, no.4
- Journal Title
- PHYSICAL REVIEW C
- Volume
- 85
- Number
- 4
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/12453
- DOI
- 10.1103/PhysRevC.85.045803
- ISSN
- 0556-2813
- Abstract
- We investigate the structure of proto-neutron stars (PNSs) with trapped neutrinos by using a quark-meson coupling model. We adopt a phenomenological lepton density which is diffuse near the surface. We calculate the populations of baryons and leptons, the equations of state, and the mass-radius relation for isentropic PNS models. In addition, the moment of inertia is calculated for both PNS and cold-neutron-star (CNS) models as a means to study the change of the spin period due to the neutrino emission from a PNS. Neutrino emission from a hyperonic neutron star is shown to increase the spin by about 10% of the initial spin, while the spin of a nucleonic neutron star with a central density above rho(C) approximate to 5 rho(0) is decreased by a few % by the emission of neutrinos. Therefore, the spin change owing to the leakage of neutrinos from a PNS is a small (<10%) correction compared to other processes related to the spin change.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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